However, officials have not yet confirmed whether any of the troops were wounded.

No group has yet claimed responsibility for the attack.

Afghanistan President Ashraf Ghani met U.S. President Donald Trump on the sidelines of the U.N. General Assembly in New York and called the change in strategy "historic" and credited it with putting his country on a path toward victory over Taliban militants and other radical Islamic terrorists.

"You made this decision on the basis of courage and determination. We salute your courage, the cloud of uncertainty has been lifted, but equally important is your commitment to a political solution at the end of this process." Ghani told Trump.